[linux-2.6-block.git] / include / net / smc.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 *  Shared Memory Communications over RDMA (SMC-R) and RoCE
 *
 *  Definitions for the SMC module (socket related)
 *
 *  Copyright IBM Corp. 2016
 *
 *  Author(s):  Ursula Braun <ubraun@linux.vnet.ibm.com>
 */
#ifndef _SMC_H
#define _SMC_H

#define SMC_MAX_PNETID_LEN	16	/* Max. length of PNET id */

struct smc_hashinfo {
	rwlock_t lock;
	struct hlist_head ht;
};

int smc_hash_sk(struct sock *sk);
void smc_unhash_sk(struct sock *sk);

/* SMCD/ISM device driver interface */
struct smcd_dmb {
	u64 dmb_tok;
	u64 rgid;
	u32 dmb_len;
	u32 sba_idx;
	u32 vlan_valid;
	u32 vlan_id;
	void *cpu_addr;
	dma_addr_t dma_addr;
};

#define ISM_EVENT_DMB	0
#define ISM_EVENT_GID	1
#define ISM_EVENT_SWR	2

#define ISM_RESERVED_VLANID	0x1FFF

#define ISM_ERROR	0xFFFF

struct smcd_event {
	u32 type;
	u32 code;
	u64 tok;
	u64 time;
	u64 info;
};

struct smcd_dev;

struct smcd_ops {
	int (*query_remote_gid)(struct smcd_dev *dev, u64 rgid, u32 vid_valid,
				u32 vid);
	int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
	int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
	int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
	int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
	int (*set_vlan_required)(struct smcd_dev *dev);
	int (*reset_vlan_required)(struct smcd_dev *dev);
	int (*signal_event)(struct smcd_dev *dev, u64 rgid, u32 trigger_irq,
			    u32 event_code, u64 info);
	int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx,
			 bool sf, unsigned int offset, void *data,
			 unsigned int size);
	void (*get_system_eid)(struct smcd_dev *dev, u8 **eid);
	u16 (*get_chid)(struct smcd_dev *dev);
};

struct smcd_dev {
	const struct smcd_ops *ops;
	struct device dev;
	void *priv;
	u64 local_gid;
	struct list_head list;
	spinlock_t lock;
	struct smc_connection **conn;
	struct list_head vlan;
	struct workqueue_struct *event_wq;
	u8 pnetid[SMC_MAX_PNETID_LEN];
	bool pnetid_by_user;
	struct list_head lgr_list;
	spinlock_t lgr_lock;
	atomic_t lgr_cnt;
	wait_queue_head_t lgrs_deleted;
	u8 going_away : 1;
};

struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
				const struct smcd_ops *ops, int max_dmbs);
int smcd_register_dev(struct smcd_dev *smcd);
void smcd_unregister_dev(struct smcd_dev *smcd);
void smcd_free_dev(struct smcd_dev *smcd);
void smcd_handle_event(struct smcd_dev *dev, struct smcd_event *event);
void smcd_handle_irq(struct smcd_dev *dev, unsigned int bit);
#endif	/* _SMC_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
f16a7dd5 UB	2	/*
	3	* Shared Memory Communications over RDMA (SMC-R) and RoCE
	4	*
	5	* Definitions for the SMC module (socket related)
	6	*
	7	* Copyright IBM Corp. 2016
	8	*
	9	* Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
	10	*/
	11	#ifndef _SMC_H
	12	#define _SMC_H
	13
0afff91c UB	14	#define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */
0afff91c UB	15
f16a7dd5 UB	16	struct smc_hashinfo {
	17	rwlock_t lock;
	18	struct hlist_head ht;
	19	};
	20
	21	int smc_hash_sk(struct sock *sk);
	22	void smc_unhash_sk(struct sock *sk);
c6ba7c9b HW	23
	24	/* SMCD/ISM device driver interface */
	25	struct smcd_dmb {
	26	u64 dmb_tok;
	27	u64 rgid;
	28	u32 dmb_len;
	29	u32 sba_idx;
	30	u32 vlan_valid;
	31	u32 vlan_id;
	32	void *cpu_addr;
	33	dma_addr_t dma_addr;
	34	};
	35
	36	#define ISM_EVENT_DMB 0
	37	#define ISM_EVENT_GID 1
	38	#define ISM_EVENT_SWR 2
	39
201091eb UB	40	#define ISM_RESERVED_VLANID 0x1FFF
201091eb UB	41
42bfba9e UB	42	#define ISM_ERROR 0xFFFF
42bfba9e UB	43
c6ba7c9b HW	44	struct smcd_event {
	45	u32 type;
	46	u32 code;
	47	u64 tok;
	48	u64 time;
	49	u64 info;
	50	};
	51
	52	struct smcd_dev;
	53
	54	struct smcd_ops {
	55	int (query_remote_gid)(struct smcd_dev dev, u64 rgid, u32 vid_valid,
	56	u32 vid);
	57	int (register_dmb)(struct smcd_dev dev, struct smcd_dmb *dmb);
	58	int (unregister_dmb)(struct smcd_dev dev, struct smcd_dmb *dmb);
	59	int (add_vlan_id)(struct smcd_dev dev, u64 vlan_id);
	60	int (del_vlan_id)(struct smcd_dev dev, u64 vlan_id);
	61	int (set_vlan_required)(struct smcd_dev dev);
	62	int (reset_vlan_required)(struct smcd_dev dev);
	63	int (signal_event)(struct smcd_dev dev, u64 rgid, u32 trigger_irq,
	64	u32 event_code, u64 info);
	65	int (move_data)(struct smcd_dev dev, u64 dmb_tok, unsigned int idx,
	66	bool sf, unsigned int offset, void *data,
	67	unsigned int size);
201091eb	68	void (get_system_eid)(struct smcd_dev dev, u8 **eid);
8caaccf5	69	u16 (get_chid)(struct smcd_dev dev);
c6ba7c9b HW	70	};
	71
	72	struct smcd_dev {
	73	const struct smcd_ops *ops;
	74	struct device dev;
	75	void *priv;
	76	u64 local_gid;
	77	struct list_head list;
	78	spinlock_t lock;
	79	struct smc_connection **conn;
	80	struct list_head vlan;
	81	struct workqueue_struct *event_wq;
1619f770	82	u8 pnetid[SMC_MAX_PNETID_LEN];
f3d74b22	83	bool pnetid_by_user;
a2351c5d	84	struct list_head lgr_list;
a0a62ee1	85	spinlock_t lgr_lock;
5edd6b9c UB	86	atomic_t lgr_cnt;
5edd6b9c UB	87	wait_queue_head_t lgrs_deleted;
c3d9494e	88	u8 going_away : 1;
c6ba7c9b HW	89	};
	90
	91	struct smcd_dev smcd_alloc_dev(struct device parent, const char *name,
	92	const struct smcd_ops *ops, int max_dmbs);
	93	int smcd_register_dev(struct smcd_dev *smcd);
	94	void smcd_unregister_dev(struct smcd_dev *smcd);
	95	void smcd_free_dev(struct smcd_dev *smcd);
	96	void smcd_handle_event(struct smcd_dev dev, struct smcd_event event);
	97	void smcd_handle_irq(struct smcd_dev *dev, unsigned int bit);
f16a7dd5	98	#endif /* _SMC_H */